High-density foam design for firm supportSlip-resistant gripRadius edges for ergonomic comfort + styleConstructed of 100% EVA foam (50-75% recycled post industrial and post consumer)Recycled paper product packagingWeight: 1 lb. (0.45 kg)Dimensions: 4 in x 6 in x 9 in (10 cm x 15 cm x 23 cm) Manduka's Recycled Foam Yoga Block is the first among equals - consisting of over 50% recycled EVA foam, this lightweight yoga block provides unbeatable comfort, style and support. Design & Features: Contains between 50%-75% recycled post-industrial & post-consumer EVA foam Radius edges for comfort and beauty High density, extreme durability, firm support Soft, comfortable grip that is also slip-resistant Additional Details: For additional information relating to the Manufacturer's Warranty, please contact 1-877-626-3857